We made out solar ovens with these materials and tools. They are: kitchen foil, scissors, a box or cardboard, black plastic bags and sellotape.
Our solar oven
We wrapped the foil in the box and used the sellotape to mend the foil against the box properly. We used the scissors for cutting and we also wrapped the black plastic bag in the box tool. The main aim of using the foil is to direct the sun rays to the plastic bag for it to absorb the sun rays. Our main motive for making the solar oven is to use it to cook eggs.
Silvester checking the temperature in the solar oven
We poured water into a plastic cup and put it in the box and placed it where the sun was shining. We left it there for some minutes and later we went to check the temperature of the water. The highest temperature we got was 54 °C and we were unable to cook the eggs since we did not get the temperature for cooking.
This is how we made our solar ovens.
The Lab_13 Network 
What a simple and impressive idea. What else might you do with 54 degrees? Cathy (Ignite!)